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1.2 What happens in cells (and what do cells need)?

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Question 23

A student analyzing a sample of double-stranded genomic DNA from a cell determines that 32% of the nucleotides contain the nitrogenous base cytosine. What percentage of the nucleotides in this DNA sample are adenine?

A

36%36\%36%

B

32%32\%32%

C

18%18\%18%

D

68%68\%68%

Markscheme

1.2 What happens in cells (and what do cells need)? Questions

  1. GCSE
  2. /Biology
  3. /1.2 What happens in cells (and what do cells need)?

72 exam-style questions on OCR GCSE Biology 1.2 What happens in cells (and what do cells need)?, covering 1.2.1 Structure of DNA, 1.2.2 Nucleotides and complementary bases, 1.2.3 Protein synthesis, 1.2.4 DNA structure and the proteins made, 1.2.5 Investigating enzymatic reactions, and 1.2.6 Mechanism of enzyme action. Each one has a worked solution and a mark scheme showing where the marks go.

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